HOME >> BIOLOGY >> NEWS
DNA evidence suggests 3 types of elephants roam Africa

orphologically "indeterminate," or having both forest and savanna forms.

Their geographic isolation may have been caused by the desertification of a region in west Africa called the Dahomey Gap that separated the forests in central Africa from the forests in west Africa. Other potential barriers between the two regions include the Niger River Delta and the volcanic region of southwestern Cameroon. Based on their genetic data, the UCSD biologists believe that the west African populations have been isolated for as long as 2.4 million years.

The UCSD scientists note in their paper that while their genetic analyses of the mitochondrial, or maternally inherited, DNA sequences and nuclear microsatellite loci (short repetitive segments of DNA that show differences among populations and individuals) suggest the existence of "three recognizable taxa of African elephants," their results need to be confirmed before a formal taxonomic revision of the African elephants is proposed. That confirmation would require examination of additional nuclear DNA sequences which are inherited paternally as well as maternally.

"If the level of genetic differentiation between the three taxa identified here is confirmed to reflect several million years of divergence, it will be appropriate to treat them as species in recognition of their long independent evolutionary trajectories," they write in their paper.

Because nearly all of the African elephants in zoos are savanna elephants, the results do not have implications for elephants now in captivity. Zoos do not have forest elephants, largely because they are so elusive, and only three western elephants are now in captivity at the Abidjan Zoo in Cte d'Ivoire. However, the results have widespread implications for the management of all three types of wild African elephants. Although the ivory trade ban has slowed the slaughter of elephants, some countries have appealed for permission to resume the harvest.

"Only the sav
'"/>

Contact: Kim Mcdonald
kimmcdonald@ucsd.edu
858-534-7572
University of California - San Diego
12-Sep-2002


Page: 1 2 3 4

Related biology news :

1. New evidence of radiation risk in childhood leukaemia
2. Oldest evidence for processing of wild cereals: starch grains from barley, wheat, on grinding stone
3. Earliest evidence of hereditary genetic disorder discovered by Hebrew University researchers
4. Study finds first evidence COX-2 enzymes can regulate DNA damage
5. Researchers find evidence that sea turtles navigate with magnetic maps
6. Researchers report definitive evidence that HIV-AIDS is not from oral polio vaccine
7. Oldest known evidence of cat taming found in Cyprus, researchers report in Science
8. More evidence of major global extinctions
9. New evidence points to pollution as main cause of much coral reef destruction
10. New evidence suggests that monkey thought extinct still exists
11. Earliest evidence of humans affecting aquatic ecology in Canada, United States

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: DNA evidence suggests types elephants roam Africa

(Date:10/16/2014)... and Mary,s Virginia Institute of Marine Science have ... Protection Agency to identify the streams and wetlands ... tools to help local governments and citizens conserve ... on a dataset of tidal-marsh observations first gathered ... this historical baseline can today,s researchers accurately map ...
(Date:10/16/2014)... monocultures can be cultivated efficiently, they are anything ... caused by monoculture cultivation is becoming increasingly evident. ... crop form and are regarded as the sole ... – quite wrongfully, finds Bernhard Schmid, an ecology ... a novel form of agriculture and forestry. After ...
(Date:10/16/2014)... , October 16, 2014 NXT-ID, Inc. (NASDAQ: ... "Company"), a biometric authentication company focused on the growing ... edge technologies including Wocket™, the Smart Wallet, at the ... FiRe is a leading global conference on the intersection ... by Mark Anderson , founder and publisher of ...
Breaking Biology News(10 mins):EPA grant will help localities conserve headwater wetlands 2EPA grant will help localities conserve headwater wetlands 3Plant communities produce greater yield than monocultures 2Plant communities produce greater yield than monocultures 3NXT-ID Inc. to Present at 13th Annual FiRe Conference 2NXT-ID Inc. to Present at 13th Annual FiRe Conference 3
(Date:10/25/2014)... ... the addition of the  "The Global Market ... Nanomaterials "  report to their offering.  ... graphene are the strongest, lightest and most ... performance-per-weight greater than any other material. In ...
(Date:10/22/2014)... The Americas Inorganic Refrigerants Market report ... Americas with analysis and forecast of revenue. , ... Refrigerants Market report, to get an idea of ... glimpse of the segmentation in the Americas inorganic ... and figures. , http://www.micromarketmonitor.com/market/americas-inorganic-refrigerants-4191654241.html , ...
(Date:10/22/2014)... Cranford, NJ (PRWEB) October 22, 2014 ... technologies and services – has been working with a ... Health and New Haven Farms Community Farming Collaborative to ... iPad-based ePRO solution. The study, which started in ... Wellness program that provides participants weekly exposure to and ...
(Date:10/22/2014)... According to new market research report "Cloud Professional ... & Support), by Service Model (SaaS, PaaS, IaaS), ... & Community)) - Global Forecast to 2019", published ... Services Market into various sub-segments with an in-depth ... the drivers and restraints for this market with ...
Breaking Biology Technology:The Global Market for Carbon Nanotubes, Graphene and Other 2-D Nanomaterials 2The Global Market for Carbon Nanotubes, Graphene and Other 2-D Nanomaterials 3The Global Market for Carbon Nanotubes, Graphene and Other 2-D Nanomaterials 4The Americas Inorganic Refrigerants Market is estimated to grow to $71.6 million by 2018 - New Report by MicroMarket Monitor 2The Americas Inorganic Refrigerants Market is estimated to grow to $71.6 million by 2018 - New Report by MicroMarket Monitor 3myPROpad™ Topic of Panel Discussion at the Yale Food Systems Symposium 2myPROpad™ Topic of Panel Discussion at the Yale Food Systems Symposium 3Cloud Professional Services Market by Public, Private, Hybrid & Community Expected to Reach $34.41 Billion by 2019 - New Report by MarketsandMarkets 2Cloud Professional Services Market by Public, Private, Hybrid & Community Expected to Reach $34.41 Billion by 2019 - New Report by MarketsandMarkets 3Cloud Professional Services Market by Public, Private, Hybrid & Community Expected to Reach $34.41 Billion by 2019 - New Report by MarketsandMarkets 4Cloud Professional Services Market by Public, Private, Hybrid & Community Expected to Reach $34.41 Billion by 2019 - New Report by MarketsandMarkets 5
Cached News: